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Celebrating Pi Day
Celebrating Pi Day
Calculating the ratio of a circle"s circumference to its diameter is as easy as pi. Today is Pi Day, an event that celebrates this mathematical constant. This date was chosen because 3, 1 and 4 are the first three significant figures of pi (π) when it is written out. Pi is an irrational number, which means that it can"t be written as a fraction. When written out, its decimal representation goes on infinitely without repeating. The oldest attempts to calculate pi date back to ancient Babylon and Egypt, around 1,900 BCE.Desktop Version
International Day for Monuments and Sites
International Day for Monuments and Sites
Imagine a world without the pyramids, the Great Wall or ancient cave cities—hard to picture, right? That"s why April 18 is the International Day for Monuments and Sites, an event recognised by UNESCO dedicated to protecting cultural treasures worldwide. This day is all about celebrating our history, raising awareness about endangered sites and making sure future generations can enjoy them too. A remarkable example is Göreme Historical National Park in Cappadocia, Türkiye. It"s famous for its "fairy chimneys"—towering rock formations shaped by volcanic ash and erosion over thousands of years. People even carved homes, churches and entire underground cities into these soft rock formations, some dating back to the 4th century. Today, it"s a UNESCO World Heritage Site, attracting visitors from around the world.Desktop Version
A light in the coastal darkness
A light in the coastal darkness
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Earth Day
Earth Day
On Earth Day, let"s journey to one of nature"s most stunning displays of geothermal power—Grand Prismatic Spring in Yellowstone National Park, Wyoming. The largest hot spring in the United States, it spans over 110 metres across and reaches temperatures of 71°C. This geothermal marvel is fuelled by the immense heat of the massive Yellowstone volcano beneath the surface. Its vivid rings of blue, green, yellow and orange are created by heat-loving microorganisms—called thermophiles—that thrive in the mineral-rich waters.Desktop Version
It’s party time
It’s party time
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Cheetah in Ngorongoro Conservation Area, Tanzania
Cheetah in Ngorongoro Conservation Area, Tanzania
Blink and you"ll miss it! The fastest mammal in the world, the cheetah, seen here in Ngorongoro Conservation Area, is one of Tanzania"s iconic big cats. Cheetahs inhabit diverse landscapes, ranging from the Serengeti grasslands to the arid expanses of the Sahara. They have long tails, elongated legs and a slender build that help them move quickly.Desktop Version
Race to the finish
Race to the finish
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Vernazza, Cinque Terre, Liguria, Italy
Vernazza, Cinque Terre, Liguria, Italy
Perched on the rugged cliffs of the Italian Riviera, Vernazza is a village in Cinque Terre, northwestern Italy. Here, ancient buildings stand along the coastline of the Ligurian Sea and life is filled with the hustle and bustle of fishermen. Vernazza got its name from the indigenous wine, "vernaccia," meaning "local" or "ours." One of the best-known monuments in the area is Doria Castle, built in the 15th century as a defensive fortress to protect the village from frequent pirate attacks. Thanks to the construction of the Genoa–La Spezia rail line in the 19th century, the village became more accessible by land. The cobblestone streets and absence of cars make it ideal for walking around. While here, you might want to visit the Chapel of Santa Marta and the Sanctuary of Madonna di Reggio. Did you know that this region inspired the 2021 animated movie "Luca"? Vernazza is not just a place to visit; it"s a piece of paradise reserved for those who seek the soul of Italy in its purest form.Desktop Version
World Bicycle Day
World Bicycle Day
Bicycles are the best! An environmentally friendly form of transportation that is fun, good for your health, affordable, simple and durable. Once you learn to ride, you"ll never forget how to wheel around. Thanks to Polish-American scientist Leszek Sibiliski"s initiative, the United Nations declared June 3 World Bicycle Day in 2018.Desktop Version
Gateway to Iberia
Gateway to Iberia
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One rare streak
One rare streak
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Turtle-y nice day for a swim
Turtle-y nice day for a swim
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Stonewall uprising anniversary
Stonewall uprising anniversary
Fifty-five years ago today, a movement was born. In the early hours of June 28, 1969, New York City Police raided the Stonewall Inn, a gay bar in Greenwich Village, USA. At the time, homosexuality was illegal, and raids against LGBTQIA+ establishments were common. However, on that night, the patrons of the Stonewall Inn, fed up with the continued harassment, decided to stand their ground. Violence escalated, leading to clashes between protesters and police. In the following days, there was more rioting as people gathered to protest the raids.Desktop Version
A day for cousins of every stripe
A day for cousins of every stripe
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Time to make an impression
Time to make an impression
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International Day for Biosphere Reserves
International Day for Biosphere Reserves
Today is the International Day for Biosphere Reserves. Biosphere reserves may sound like a scientific mouthful, but they"re essentially nature"s sweet spots—places where biodiversity, or variety of life on Earth, thrives. These areas, recognised by UNESCO, keep ecosystems healthy, protect endangered species and help regulate climate through forests, wetlands and other crucial habitats. There are 759 biosphere reserves across 136 countries. From the lush greenery of Sundarbans in India to the vast expanses of the Great Sandy Biosphere Reserve in Australia, each reserve is unique.Desktop Version
The lonely castle
The lonely castle
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Angry bird, doting dad
Angry bird, doting dad
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The butterfly effect
The butterfly effect
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Paro Tsechu Festival, Bhutan
Paro Tsechu Festival, Bhutan
Get ready for a festival like no other—the Paro Tshechu of Bhutan—where drums echo, prayer flags flutter and masked dancers take centre stage. One of Bhutan"s annual religious festivals, which are known as tshechus, it is a vibrant showcase of Vajrayana Buddhist heritage. The celebration begins on the 10th day of the second lunar month, which typically falls in March or April. This year, the festival kicks off today and concludes on April 12.Desktop Version
Bridging past and present
Bridging past and present
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On the edge
On the edge
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Spring equinox
Spring equinox
With the sun rising higher, the days grow longer, marking the arrival of spring. The spring equinox occurs when the sun crosses the celestial equator, moving from the Southern Hemisphere to the Northern Hemisphere. Traditionally, spring is considered to begin on March 21. However, astronomers and calendar makers now agree that spring officially commences on March 20 across all time zones in North America. This event signals the true start of the season, bringing with it the beauty and symbolism of spring blooms.Desktop Version
Sea lion in a kelp forest, Baja California, Mexico
Sea lion in a kelp forest, Baja California, Mexico
Take a stroll along almost any marina from Costa Rica to Alaska, and you"ll likely hear the playful barks of sea lions echo through the air. California sea lions, like the one pictured, are a common sight basking in the sun along the rocky shores of North America"s western coast. These marine mammals, belonging to the pinniped group, are often mistaken for seals. An easy way to distinguish between them is by looking at their ears—sea lions have visible flaps, seals don"t.Desktop Version
Bring the king cakes
Bring the king cakes
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